Principles of Operation

Luggage Compartment Lid

Principles of Operation

Luggage Compartment Lid

The Liftgate/Trunk Module (LTM) receives a voltage signal from the Driver Door Module (DDM) when the button on the driver door trim panel, the Remote Keyless Entry (RKE) keypad or the RKE transmitter is pressed (twice on the RKE transmitter). The LTM supplies voltage to the lid motor to move the lid to the full-open position when it senses the latch has been opened. Using the luggage compartment lid key operates the latch mechanically, resulting in manual-only operation of the lid.

There are 2 switches in the latch. The LTM monitors the switches.

Optical sensors within the lid motor are monitored by the module to determine when to turn off power and which circuits should be powered or grounded to the lid motor. When one of the buttons is pressed with the lid open, the DDM sends a signal to the LTM which supplies voltage and grounds the correct circuits to the lid motor and lowers the lid until the latch closes.

When one of the buttons is pressed with the lid open, the DDM sends a signal to the LTM which supplies voltage to the lid motor and lowers the lid until the latch closes. At this time, the module supplies voltage to the closing motor, slowly pulling the lid to a fully closed position. The striker down switch and the striker up switch within the closing motor are monitored by the module to determine when the closing motor is fully down or up.

The LTM receives vehicle speed information from the PCM. The LTM will shut down the system if vehicle speed is above 5 km/h (3 mph). For diagnostics, the module uses the ISO network. Whenever battery voltage is lost to the LTM, luggage compartment lid motor or the luggage compartment lid closing motor, the system must be initialized.